Games like Final Fantasy XI

"Final Fantasy XIV Online is a fantasy open-world, massively multiplayer online role-playing game where players can adventure alone or with friends. Explore the realm of Eorzea, forge friendships, and embark on epic quests to battle monsters and acquire unique abilities. Experience the epic and ever-changing Final Fantasy universe and help reforge the fate of Eorzea."

EverQuest II is a free-to-play MMORPG with deep gameplay and a thriving community, now spanning 18 years and 19 expansions. Featuring 125 levels, countless quests, diverse environments, and extensive character development options, it offers a rich fantasy world to explore with support for various play styles including solo, group, raid, and PVP. Enjoy an independently leveled tradeskill system, robust housing, and a myriad of creatures to battle.

"Dungeons & Dragons Online is a free, 3.5 edition RPG game with authentic gameplay and iconic monsters from the beloved tabletop game. Experience danger and adventure, test your skills in combat, and play alone or with friends in this massively-multiplayer online game."

Ryzom, also known as The Saga of Ryzom, is a free and open source massively multiplayer online role-playing game developed by Nevrax for Microsoft Windows, OS X, and Linux.

"Anarchy Online is a massively multiplayer fantasy role-playing game set in a science fiction world 30,000 years in the future. Choose from 14 character classes, customize your skills and abilities, and explore a vast, alien world with diverse landscapes. Battle other players, complete missions for rewards, and join organizations to claim territory and resources."

Age of Conan: Unchained is an award-winning and critically acclaimed massively multiplayer online game set in the sexy, savage and brutal world of Conan the Barbarian. Tread in the footsteps of the greatest fantasy hero of all time, and explore the vast reaches of Hyboria. Choose between twelve different classes, from Barbarian to Demonologist, and fight your way to riches and glory as you battle …

"Wakfu is a massively multiplayer, turn-based strategy game set in the World of Twelve. Engage in action-packed, tactical battles with 18 unique classes, and choose your path as a warrior, politician, merchant, or craftsman. With a humor-filled universe and a player-driven economy, Wakfu offers a limitless and dynamic adventure."

In Guild Wars 2, explore a vibrant open world filled with dynamic events and NPCs with their own stories. Collaborate with other players without the need for party members, and earn experience through various activities. Discover a diverse range of weapons, each with unique playstyles for your character.

"Star Wars: The Old Republic" is a free-to-play MMO that lets you play as various STAR WARS roles and explores the galaxy 3000 years before the classic films. The game features a personalized story-driven saga with cinematic dialogue, full voiceover, and the option to choose between the Light or Dark side of the Force. With ongoing content through regular updates and 8 unique stories, players can create their own legacy in this expansive STAR WARS world.

In Dungeon Siege II, players journey through a vibrant fantasy world, battling hordes of enemies as they uncover a deep story filled with intrigue and betrayal. With improved combat and magic systems, players can customize their characters and party members, using a wide variety of weapons and spells to defeat their foes. The game also features a rich multiplayer mode, allowing players to team up and adventure together online.